.w {
  width: 1000px;
  margin: 0 auto;
}
body {
  width: 100%;
  font-family: '微软雅黑';
}
body .banner {
  width: 100%;
}
body .banner img {
  width: 100%;
}
body .one_floor {
  position: relative;
}
body .one_floor h2 {
  width: 416px;
  height: 30px;
  text-align: center;
  line-height: 36px;
  margin: 0 auto;
  font-size: 30px;
  font-weight: normal;
  margin-top: 30px;
}
body .one_floor .underline {
  width: 572px;
  margin: 30px auto 0;
  border-bottom: 1px dashed #febda9;
}
body .one_floor .top {
  display: flex;
  margin-top: 20px;
  justify-content: space-between;
  align-items: flex-end;
  height: 450px;
  background: url('../images/teaching/teachingbg.jpg') top center no-repeat;
  background-size:60% auto;
}
body .one_floor .top .part {
  width: 25%;
}
body .one_floor .top .part h3 {
  width: 100%;
  text-align: center;
  font-size: 18px;
  font-weight: normal;
  padding: 5px;
  margin-bottom: 8px;
}
body .one_floor .top .part:nth-of-type(1)  {
  margin-left: 10%;
}
body .one_floor .top .part:nth-of-type(3)  {
  margin-right: 10%;
}
body .one_floor .top .part:nth-of-type(1) h3 {
  color: #20d5c4;
}
body .one_floor .top .part:nth-of-type(1) figure {
  height: 240px;
  background: #20d5c4;
  text-align: center;
  padding: 0.1px;
  border-radius: 5%;
}
body .one_floor .top .part:nth-of-type(1) figure img {
  display: block;
  margin: 60px auto 20px auto;
  width: 80px;
}

body .one_floor .top .part:nth-of-type(1) figure figcaption p {
  font-size: 14px;
  line-height: 24px;
  color: #fff;
}
body .one_floor .top .part:nth-of-type(2) h3 {
  color: #f6b900;
}
body .one_floor .top .part:nth-of-type(2) figure {
  height: 280px;
  background: #ecda36;
  text-align: center;
  padding: 0.1px;
  border-radius: 5%;
}
body .one_floor .top .part:nth-of-type(2) figure img {
  display: block;
  margin: 80px auto 40px auto;
  width: 80px;
}
body .one_floor .top .part:nth-of-type(2) figure figcaption p {
  font-size: 14px;
  line-height: 24px;
  color: #fff;
}
body .one_floor .top .part:nth-of-type(3) h3 {
  color: #fd5621;
}
body .one_floor .top .part:nth-of-type(3) figure {
  height: 320px;
  background: #ffa366;
  text-align: center;
  padding: 0.1px;
  border-radius: 5%;
}
body .one_floor .top .part:nth-of-type(3) figure img {
  display: block;
  margin: 80px auto 80px auto;
  width: 80px;
}
body .one_floor .top .part:nth-of-type(3) figure figcaption p {
  font-size: 14px;
  line-height: 24px;
  color: #fff;
}
body .one_floor .center {
  width: 100%;
  height: 60px;
  display: flex;
  justify-content: space-between;
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -120px;
}
body .one_floor .center p {
  width: 80px;
  height: 80px;
  background-color: #20d5c4;
}
@media (max-width: 1000px) {
  body .one_floor .center {
    display: none;
  }
}
body .one_floor .bottom {
  width: 100%;
  height: 500px;
  background: url('../images/teaching/bottombg.jpg') top center no-repeat;
  background-size: 90% auto;
  position: relative;
}
body .one_floor .bottom h3 {
  font-size: 30px;
  font-weight: normal;
  color: #f59100;
  text-indent: 40px;
  margin-top: 90px;
}
body .one_floor .bottom .circle {
  font-size: 14px;
  position: absolute;
  left: 400px;
  bottom:75px;
}
body .one_floor .bottom .kuang {
  width: 220px;
  font-size: 14px;
  line-height: 24px;
  color: #20d5c4;
  position: absolute;
  right: 85px;
  bottom: 150px;
}
@media (max-width: 1440px) {
  body .center {
    display: none;
  }
  body .separate {
    width: 1200px;
    border: 1px dashed #febda9;
    margin: 0 auto;
  }
}
@media (min-width: 1441px) {
  body .separate {
    width: 1526px;
    border: 1px dashed #febda9;
    margin: 0 auto;
  }
}
body .two_floor .w {
  height: 100%;
  margin: 30px auto;
  position: relative;
  /*background: url('../images/teaching/twofloorbg.png') center center no-repeat;
  background-size: 100% auto;*/
}
body .two_floor .w .kuang {
  width: 220px;
  font-size: 14px;
  line-height: 24px;
  color: #20d5c4;
  position: absolute;
  z-index: 999;
  left: 150px;
  top: 190px;
}
body .two_floor .w .circle {
  width: 320px;
  font-size: 14px;
  line-height: 24px;
  position: absolute;
  z-index: 999;
  right: 60px;
  bottom: 130px;
}
body .two_floor .w .circle b {
  width: 100%;
  text-align: center;
  font-size: 30px;
  margin-bottom: 5px;
  font-weight: normal;
  display: block;
}
body .three_floor {
  width: 100%;
}
body .three_floor .w {
  position: relative;
  height: 560px;
  background: url('../images/teaching/threefloorbg.jpg') center center no-repeat;
  background-size: 80% auto;
}
body .three_floor .w .kuang {
  width: 220px;
  font-size: 14px;
  line-height: 24px;
  color: #20d5c4;
  position: absolute;
  left: 175px;
  top: 175px;
}
body .three_floor .w .circle {
  width: 320px;
  font-size: 14px;
  line-height: 24px;
  position: absolute;
  right: 190px;
  bottom: 95px;
}
body .three_floor .w .circle b {
  width: 100%;
  text-align: center;
  font-size: 30px;
  margin-bottom: 5px;
  font-weight: normal;
  display: block;
}
body .four_floor {
  width: 100%;
  height: 560px;
  background: url('../images/teaching/fourfloorbg.jpg') center center no-repeat;
  margin-bottom: 50px;
  background-size: auto 100%;
}
body .four_floor .w {
  height: 100%;
  position: relative;
}
body .four_floor .w .kuang {
  width: 240px;
  font-size: 14px;
  line-height: 24px;
  color: #20d5c4;
  position: absolute;
  right: 110px;
  top: 180px;
}
body .four_floor .w .circle {
  width: 360px;
  font-size: 14px;
  line-height: 24px;
  position: absolute;
  left: 160px;
  bottom: 100px;
}
body .four_floor .w .circle b {
  width: 100%;
  text-align: center;
  font-size: 30px;
  margin-bottom: 5px;
  font-weight: normal;
  display: block;
}
